let isDone: boolean = false;
let age: number = 10;
let firstName: string = 'viking';
let message: string = `hello ${firstName}`
let u: undefined = undefined;
let n: null = null;
let num: number = undefined;
let notSure: any = 4;
notSure = '12313212'
notSure = true;
notSure.name
notSure.getName();